<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script> 
</head>

<body>
    <div id="app">
       在日本这个游戏机是:{{price}},含税价格{{price1}},折合成人民币{{price2}}元。
       <button  @click="btnclick(1000)">加价1000<tton>
    </div>
    <script>
    var vm =new Vue({
        el:'#app',
        data:{
            price:29980,
            price1:0,
            price2:0
        },
        methods:{
            btnclick(newprice){
              this.price +=newprice;
            }
        },
        watch:{
            //watch:{
                //被监听的数据(newval,oldval)
                //相关代码逻辑
           // }
           price(newval,oldval){
            this.price1=this.price*1.08;
            this.price2=Math.round(this.price1/16.75);
           }
        }
        })
    </script> 
</body>

</html>
